Problem 7:
Consider a sequence of four integers so that the GCD of first three is the same as the LCM of the last three. How many such sequences exist so that the sum of the numbers is $2011$?
BdMO National Junior 2011/7
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin
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Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.
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Re: BdMO National Junior 2011/7
Solution is posted here.